Let-off motion for looms.



PATENTED OCT. 13, 1903.

H. WIDMER.

LET-OFF MOTION FOR LOO-MS.

APPLIQATION FILED NOV. 4:, 1902.

N0 MODEL.

WITNESSES:

ATTORNEY weight or cross bar 0.

UNITED STATES Patented October is, 1903.

P TENT OFFICE.

LET -OFF MO'l'lON FOR L'OOMS.

SPECIFICATION forming part of Letters Patent No. 741,602, dated October13, 1903.

Application filed November 4,1 902. Serial No. 180,075. (No model.)

To all whom it may concern:

Be it known that I, HEINRICH WIDMER, a citizen of the United States,residing at Union Hill, in the county of Hudson and State of New Jersey,have invented new and useful Improvements in Let-01f Motions forLooms, of which the following is a specification.

By means of this invention a take-up and let-0E can be secured adaptedto insure satisfactory weaving.

This invention has been tested in connection with silk-weaving; but ofcourse the scope of the invention is not to be thereby limited. v V rThe invention resides in certain novel features of construction setforth in the following specification and claims, and illustrated in theannexed drawings, in which- Figure 1 shows a side elevation of a loom.Fig. 2 shows a rear elevation of Fig. l or, in other words, a viewlooking in the direction from the warp to the cloth-beam.

The loom as known comprises the warpbeam b, on which is woundwarp-threads a, passingover roller 0 and carried through the heddles tobe formed into sheds for the passage of the shuttle. Thefinished fabricor cloth is wound on cloth-beam *i. A certain tension or brake action onwarp-beam b is secured by weight 1, whose cords or ropes 2 clasp or runabout opposite end parts of said beam 1).

The parts thus far described are old and form no part of this invention.

The new parts constituting the invention are the eccentric or crank e onshaft or stud f, rotated by gear g, and driving disk or gear h. Thecrank e by link Z oscillates lever m m fulcrumed at n. Arm m connectswith two ropes or cords 3, respectively wound, say, two or three timesabout a respective end of warpbeam 17 and having at their-other ends theThe weight of bar 0 can be varied by applying one or more removableweights osay, ordinary scaleweights-or any other removable weight thatis ready to hand. As the shed closes or the Warp-threadscome to a commonplane the warp-threads slacken, and at the same time the crank 6 (shownat main shaft f) moves lever-arm m downward and arm m rises to slackenthe cords or flexible connections and allow weight 0 to descend. Thismovement of cords 3 tends to rotate warp-beam b backward and take up theslackcaused by the warp-threads closing the shed. As the shed reopensthe crank e moves the lever to swing arm 'm downward and pull cords 3 tolift weight 0 and aid the forward rotation of warp-beam 1). Excessivetension of the warpthreads in forming a shed is thus avoided. Ifthethreads are delicate-say, in some cases of silk-weaving-excessivestrain should be avoided, as otherwise the warp-threads maybetorn.

The arrow in Fig. 1 shows the direction in which the finished clothtravels to clothbeam '5.

The word cord herein of course means.

a suitable rope or flexible connection of suitable strength and make. 7V

In speaking .of a lever m m it is noted that, as shown, there are reallytwo levers at opposite sides of theloom,'one lever appliance for eachcord 3; but as the levers act in unison or the explanation'of one leverapplies to the other the above description sets forth the operation ofthis invention.

In place of weights, aso or 0', a spring or springs can be applied; buta weight is preferred.

What I claim as new, and desire to secure I by Letters Patent, isa 1.The combination with the warp-beam of a loom, of means independent ofthe warp and actuated by the operation of the 100m for rotating saidbeam backward, when the shed closes, sufficiently to take up the slackin the warp-threads.

2. The combination with the warp-beam of a loom, of means independent ofthe warp and actuated by the operation of the loom, for roweight-barbeing adapted to receive or seat removable weights foradjusting thebrake action. I

4. The combination with the warp-beam of and a lever for actuating thecord and beam a 100m, of means, comprising an operatingback and forth totighten and slacken the shaft, a lever reciprocated by said shaft, awarp, said cord'and oscillating lever being 15 cord attached at one endto said lever and exindependent of the warp. 5 tending around saidwarp-beam, and aweight In testimony whereof I have hereunto set attachedto the end of said cord, for rotating my hand in the presence of twosubscribing said beam backward, when the shed closes, witnesses.

sufficiently to take up the slack in the warpv i 7 threads; and forfacilitating its forward rota- HEINRICH IDMER' 10 tion when the shedopens. Witnesses:

5. A 100m having a warp-beam, a weighted E. F. KASTENHUBER,

friction-cord made to engage the warp-beam, CHAS. E. POENSGEN.

